Question

Find the roots of quadratic equations by factorisation:
(i) √2 x2 + 7x + 5√2=0
(ii) 100x2 – 20x + 1 = 0
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Answer 1

Answer:

CLASS 10

DATABASE MANAGEMENT SYSTEM

INFORMATION TECHNOLOGY TEXT BOOK

Answer the following questions,

1.How do you delete the entire table using an SQL query? Assume the name of the table to be PROBLEMAS

2 Write an SOL query to pick numbers from the field Number, display the Number in a column and its square in the

next column. The name of table is TO-BE-SQUARED

Answer 2

Step-by-step explanation:

By factorising method,

i) ✓2x^2+(2x+5x)+5✓2=0

✓2x(x+✓2)+5(x+✓2)=0

x= -✓2, x= -5/✓2

By quadratic formula,

ii) x= 20±(✓400-4*100*1)/(2*100)

x= 1/10, 1/10